return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H6 (1-Methylcyclopropene)

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-155.586170
Energy at 298.15K 
HF Energy-154.926937
Nuclear repulsion energy108.323578
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3318 3157 0.69 118.85 0.28 0.43
2 A' 3174 3020 10.91 73.32 0.73 0.84
3 A' 3099 2949 59.95 144.32 0.13 0.23
4 A' 3073 2924 18.65 208.20 0.01 0.02
5 A' 1835 1746 10.97 35.00 0.13 0.23
6 A' 1540 1466 4.62 10.47 0.38 0.55
7 A' 1497 1425 9.33 10.64 0.60 0.75
8 A' 1409 1341 0.11 3.72 0.64 0.78
9 A' 1200 1142 3.50 7.02 0.35 0.52
10 A' 1089 1036 1.48 4.88 0.09 0.17
11 A' 1066 1014 33.60 1.04 0.15 0.26
12 A' 991 943 5.61 9.11 0.22 0.36
13 A' 947 901 13.55 4.72 0.40 0.57
14 A' 681 648 0.59 13.20 0.57 0.73
15 A' 320 304 1.68 1.52 0.75 0.85
16 A" 3178 3024 33.76 89.46 0.75 0.86
17 A" 3150 2997 9.57 70.82 0.75 0.86
18 A" 1495 1422 8.37 7.30 0.75 0.86
19 A" 1131 1076 1.38 0.82 0.75 0.86
20 A" 1054 1003 0.05 1.99 0.75 0.86
21 A" 1001 953 2.29 3.13 0.75 0.86
22 A" 729 694 32.12 0.47 0.75 0.86
23 A" 290 276 12.77 0.43 0.75 0.86
24 A" 163 155 0.37 0.26 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18714.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 17807.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/Def2TZVPP
ABC
0.69094 0.21247 0.17329

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.051 -1.327 0.000
C3 1.155 -0.418 0.000
C4 -0.836 1.394 0.000
H5 -0.323 -1.850 0.912
H6 -0.323 -1.850 -0.912
H7 2.227 -0.376 0.000
H8 -0.225 2.294 0.000
H9 -1.482 1.405 -0.877
H10 -1.482 1.405 0.877

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50831.30001.47352.24892.24892.29582.12572.11362.1136
C21.50831.51032.83201.08601.08602.46893.62543.20703.2070
C31.30001.51032.69092.25112.25111.07373.04203.32313.3231
C41.47352.83202.69093.40823.40823.53761.08781.08991.0899
H52.24891.08602.25113.40821.82463.08364.24413.89123.4554
H62.24891.08602.25113.40821.82463.08364.24413.45543.8912
H72.29582.46891.07373.53763.08363.08363.62534.20754.2075
H82.12573.62543.04201.08784.24414.24413.62531.77211.7721
H92.11363.20703.32311.08993.89123.45544.20751.77211.7549
H102.11363.20703.32311.08993.45543.89124.20751.77211.7549

picture of 1-Methylcyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C3 51.018 H1 C2 C6 119.296
C2 C3 C6 24.872 C2 C3 C10 72.373
C2 C6 C3 35.797 C2 C6 H4 49.828
C2 C6 H5 32.852 C3 C2 C6 119.331
C3 C6 H4 52.022 C3 C6 H5 66.091
C3 C10 H7 9.338 C3 C10 H8 65.256
C3 C10 H9 74.690 H4 C6 H5 74.474
C6 C3 C10 86.287 H7 C10 H8 58.909
H7 C10 H9 77.963 H8 C10 H9 60.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability